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Finding the Fourth Proportional to 66,019, 91,106.22 and 36,211

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Solution

The fourth proportional to 66,019, 91,106.22 and 36,211 is: 49,971.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,019 : 91,106.22 = 36,211 : x
  2. Step 2: Convert to fraction form
    66,019/91,106.22 = 36,211/x
  3. Step 3: Cross multiply
    66,019x = 91,106.22 × 36,211
  4. Step 4: Simplify right side
    66,019x = 3,299,047,332.42
  5. Step 5: Solve for x
    x = 3,299,047,332.42/66,019
  6. Step 6: Final answer
    x = 49,971.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.